<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      //Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday.
      let week = prompt('请输入星期几')
      switch (week) {
        case '星期一':
          alert('Monday')
          break
        case '星期二':
          alert('Tuesday')
          break
        case '星期三':
          alert('Wednesday')
          break
        case '星期四':
          alert('Thursday')
          break
        case '星期五':
          alert('Friday')
          break
        case '星期六':
          alert('Saturday')
          break
        case '星期日':
          alert('Sunday')
          break
        default:
          alert('输入错误，请重新输入!')
      }
    </script>
  </body>
</html>
